Verbena, Latin name Verbena officinalis, is a perennial plant from completely rustic to delicate, native to the temperate humid areas of Europe, Western Asia and northern Africa. It can reach a height of about 70-80 cm and a diameter of about half a meter. The leaves are oval in shape, dark green in color. The flowers are lilac in color, small, arranged in spikes. Flowering occurs during the summer and can last several months for properly cultivated species, in exposed places.
Verbena plants are divided between rustic and ornamental ones as there are wide differences between the two types. While rustic plants tend to be perennial and less delicate, ornamental verbenas are grown almost exclusively as annuals. Also on the market it is possible to find a wide variety of verbena colors, more difficult to find among the spontaneous species.
As for the climate and the cultivation of verbena, the ideal position is full sun or partial shade, even if it bears hot and arid positions. The completely rustic varieties can withstand even cold temperatures, below 10 ° C, up to a maximum of 15 ° C. The most ornamental varieties have great difficulties when temperatures drop for several days below 10 ° C.
During the summer, the soil must not be constantly wet but the soil must be allowed to dry between one watering and another.